Pharmacology is a cornerstone of safe nursing practice. This page focuses on the drug knowledge and medication administration skills LPNs need: common drug classes, routes of administration, basic pharmacokinetics, high‑risk medications, and practical safety checks you can apply on shift.
Use these resources alongside our LPN Quizzes & Tests for active practice, and the LPN Dictionary for quick term lookups while studying.
Five rights of medication administration — right patient, right drug, right dose, right route, right time — form the foundation of safe practice. Always verify patient identity and allergies, and document the response to medication. For documentation clarity, consult the LPN Abbreviations and the LPN Protocols pages.
Routes and techniques — oral (PO), subcutaneous (SC), intramuscular (IM), intravenous (IV) where permitted, topical, and inhaled routes each have specific preparation and monitoring requirements. Review injection landmarks and anatomy on the LPN Anatomy page before practicing skills.
Analgesics — acetaminophen and NSAIDs for mild pain; opioids for moderate to severe pain. Monitor respiratory status and sedation with opioids; document pain scores and response. See pain management entries in the LPN Encyclopedia.
Antibiotics — classes (penicillins, cephalosporins, macrolides, fluoroquinolones) differ in spectrum and adverse effects. Check allergies and infusion rates; consult the LPN Articles for IV antibiotic administration tips and monitoring parameters.
Cardiac medications — diuretics, ACE inhibitors, beta blockers, and antiarrhythmics require close monitoring of vitals and electrolytes. Correlate with cardiovascular assessment guidance on the LPN Anatomy and the LPN Encyclopedia.
High‑risk medications (insulin, anticoagulants, opioids) often require independent double checks and clear documentation. Follow facility policy and use the LPN Protocols for step‑by‑step procedures.
Be confident with basic dose calculations and conversions (mg ↔ mcg, mL ↔ L). Practice with the LPN Quizzes & Tests and review calculation examples in the LPN Textbooks.
Document medication administration clearly, including time, route, dose, and patient response. Avoid banned abbreviations—see the LPN Abbreviations page—and use handoff templates from the LPN Protocols.
Verify allergies, check the MAR against the order, confirm the five rights, calculate dose, prepare using aseptic technique, and observe the patient after administration. If unsure, consult an RN or supervisor rather than guessing—see escalation guidance in the LPN Guidelines.
Examples: converting oral to IV dosing, preparing insulin sliding scales, and administering PRN analgesia. Each scenario includes monitoring steps and documentation examples in the LPN Articles.
Use the LPN Textbooks for foundational knowledge, the LPN Journals for current evidence, and the LPN CEU page for approved continuing education on pharmacology topics.
Create a focused study plan: review one drug class per session, practice flashcards for mechanisms and side effects, and complete calculation drills on the LPN Quizzes & Tests. Join peers in the LPN Forums to discuss tricky scenarios and share mnemonic devices.
When preparing for clinicals, pair pharmacology review with anatomy (landmarks for injections) and protocols (administration steps) to ensure knowledge translates into safe practice.